Carburetor



Dean 13, 1932.

H. 3. KERCHNER ET AL CARBURETOR 2 sheets-sheaf 1 Filed May 20, 1929 1931 H. G. KERCHNERJET AL CARBURETOR Filed May 20. 1929 V 2 sheets sheet 2 [NVENTORS 4% W140 ATTORNEY lit Patented Dee. 13, 1932 UNITED STATES PATENT OFFICE,

HOWARD G. KERC'HNER AND ROY I. KERCHNFR, OF NEAR IBELLEVILLE, ILLIlINOIS CARBURETOR Application filed May 20,

This invention relates to certain new and claimed.

f The main objects of our invention are the provision of means for improving the acceleration or pick-up of an automobile; secondly, for quickly enriching the .fuel mixtime going to the cylinders on starting, or

ducing the bulk of the mixture; thirdly, for increasing the amount of said mixture go- 'ing to the cylinders. without increasing the usual .amount of air admitted by theregulating air-valve; fourthly, for supporting; and operating our device as applied to a standard make of automobile; fifthly, for mixing with air the accelerative charge of gasoline; and sixthly, for improved means of construction hereafter described and claimed.

In the accompanying drawings in which like reference numerals indicate corresponding parts:

Fig. 1 represents part of an intake pipe, a main carburetor and adjacent parts with our improvements applied thereto;

Fig. 2, a detail sideview and top 'plan of our plunger casing;

Fig. 3, a similar view of the plunger therefor;

Fig. l, a similar viewof a pipe connection to the plunger casing.

Fig. 5, a similar view of a to the carburetor;

Fig. 6, aside view of a bracket for the plunger casing;

Fig. 7, a top plan of the same;

Fig. 8, an edgeview of the same;

Fig. 9, aside view of a slotted lever attachment for the throttle lever;

Fig. 10, a bottom plane of the same;

Fig. 11, an edge view of the same; and

Fig. 12, a plan section of our mixer check valve on the line 1212 of Fig. 1, and an end view.

Referring to the drawings, the numeral 1 designates a part of an intake pipe or intake manifold in an automobile or other explosive engine, to which is connected a main carpipe connectlon 1929. Serial No. 364,448.

buretor 2 supplied with gasoline or other fuel by a; pipe 3 from the usual fuel tank (not shown). The usual butterfly valve for regulating the charge to the cylinders is operated by the pivoted lever 4, connected by the rod 5 to the accelerator pedal convenient to the drivers foot.- The'air-inlet valve lever 6 is theconnection 7, and the screw 8 operated' by1 regulates vt equantity of gas delivered by the carburetor in the usual manner. while running at any speed, wlthout re- 7 '18" Fig. 3), having its lower end grooved circumferentially and its upper end slotted (or otherwise) for the operating end 19 of a lever attachment (Figs. 1 and 9), which endmakesa sliding engagement (preferablv) with a pin21 insaid plunger. The upper end of said casing is counterbored, forming a recess 22 to retain the gasoline that works up the plunger, and to form a seal therefor.

Said slotted lever end is offset from a. wider loop portion 23 clamping the lever 4 and having a hole 24 by which a screw 25 (or other means) secures it to said lever 4 and forms a bellcrank lever therewith.

The middle of the casing 17 ispositioned adjacent the main carburetor so that the level of the gasoline in the carburetor and plunger casing stands normally at the approximate level X in both.

Near the lower end of said casing is an outlet hole 20 above the adjacent ball check valve, to which hole is secured the lower end of a pipe 26, the upper end of which is provided with a nipple 27 and threaded connection 28 having a seat for a ball valve 29 controlled by a spring 30 mount-ed in a horizontal barrel 31 having a threaded end by which it is screwed into a tapped hole in the neck (preferably) of said intake pipe so it will be evenly intermingled with the regular mixture. The outside of said barrel is preferably hexagonal, and a pair of holes 32 in the sides admit a suitable quantity of air to the barrel to drive the gasoline into the intake pipe under the suction of the cylinders, making a concentrated fuel mixture of the extra charge of gasoline, which mixes with that coming from the main carburetor 2, at or near the neck of the intake pipe. This constitutes a mixing check valve, admitting air to mix with the gasoline and preventing return into the pipe 26. The extra fuel may be mixed with the regular mixture at any other suitable point than the neck shown as the preferred point.

The plunger casing is suitably supported in the preferred position shown in Fig. 1. by

r a bracket of suitable shape according to the style of carburetor and throttle used. The bracket shown in detail in Figs. 6. 7 and 8. is adapted to a standard make of automobile. but may be varied,as also the lever attachment (Figs. 9-l1)to suit the style and construction of other makes. As sh own. it cons sts of a c'lamping sleeve 33 tightened about the casing in its desired position by a screw 34 at the lower end of :1 depending arm 35. An ofi'set shoulder 36 locates the sleeve and casing in proper relation to the lever attach.- ment for operating the plunger. The upper end of the arm is folded downward and extended laterally (Fig. 8) to form an angular rib 37 provided with horizontal branches 38, spaced apart and having holes for fastening to the neck flange of the intake pipe, or otherwise.

Operating the rod 5 and lever 4 with its operative connection to the plunger as inclicated by arrows, thus iniects suddenlv a quantity of extra fuel into the stream of mixture from the carburetor passing the throttle valve that is opened by the same lever 4.

In other words, when more mixture is required, the rod 5 actuating the lever 4 opens the throttle valve as usual. At the same time however, the lever attachment actuates the said plunger and forces a separate and extra quantity of fuel through the mixing check valve into the intake pine where it increases the richness (temporarilvl of the usual fuel mixture going to the cvl nders. and effects a quick acceleration (pick-up) of the machine bv the increased force of explosion of the enr ched mixture.

It will be noted that this injection of extra fuel is accomplished simul aneously with and actuated by, the usual operation of the throttle lever 4. That is to sav. it is automatically effected by our attached device and requires no extra actua ing mechanism or thought of the driver. When the acceleration pedal is more or less pres ed down in the usual manner, a greater or lesser ouantitv of extra fuel is correspondingly and simu taneouslv injected into the stream of mixture coming from the carburetor. Ihe maximum quantifrom starting position), when acceleration is desired, our device inunediately responds effectively upon the usual operation of the acceleration pedal, as above described.

Recent operation of our device as illustrated in the drawings, has fully demonstrated the efficiency thereof as herein described.

Regarding the method of carburetion performed by our construction: we continue the usual function of the throttle or regulating valve for the mixture coming from the carburetor, but have available for instant use a quantity of concentrated fuel for mixing with extra air for acceleration, and this extra fuel can be injected into the usual stream of mixture on its way to the cylinders-and preferably when it reaches the neck of the intake pipe.

Thus a greatly enriched fuel mixture is suddenly though temporarily delivered to the cylinders to effect the desired acceleration and automatically with the actuating accelorator.

By our method, the bulk of the mixture is not diminished but is rather increased by the air drawn in through the air inlets of our mixing check valve, and this regular mixture from the main carburetor 2 is suddenly increased in richness when desired by operating the accelerator which by our attachment automatically injects our richer mixture into said regular mixture as above described. The final carburetion is at the point of discharge from our member 31.

We claim:

1. The combination with the neck or outlet of the carburetor of an internal combustion engine, a main carburetor communicating therewith, said carburetor having a constant level fuel chamber and a throttle valve lever below said neck, or a mixer valve consisting of a horizontal barrel threaded by one end into said neck above said throttle valve and having air inlet holes, a nipple in the other end of said barrel having a seat, a spring-controlled ball valve mounted in said seat, a vertical casing, a plunger in said casin g, a pin at the top and positioned midway of said main carburetor, said casing communicating with said constant level chamber, a pipe connection from said casing to said mixer valve, and an operating connection from the plunger pin to said throttle valve lever. substantially as described.

2. In a device of the character described, the combination with a throttle lever, its accelerator rod, and a main carburetor having a constant level fuel chamber, of a vertical tu- 1,seo,994 

